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A method for preparing a hydrocracking catalyst containing y molecular sieve

A hydrocracking and molecular sieve technology, which is applied in molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of poor temperature sensitivity of hydrocracking catalysts, increased secondary cracking, and secondary cracking during heating processes Increase and other problems, to achieve the effect of improving the liquid collection and chemical hydrogen consumption of the device, increasing the acid center, and improving the temperature raising sensitivity

Active Publication Date: 2018-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, modified Y molecular sieve is the most widely used in hydrocracking process. The conventional treatment method has uniform distribution of silicon and aluminum inside and outside the molecular sieve, and uniform distribution of acid centers. When the silicon aluminum ratio of Y molecular sieve is reduced, the acid center density of Y molecular sieve is increased, and the The temperature sensitivity is improved, but at the same time, the secondary cracking is also greatly increased, and the hydrogen consumption is greatly increased
However, when the Y molecular sieve is subjected to advanced treatment and the acid density is too low, the temperature-raising sensitivity of the catalyst is poor.
[0004] CN200710158784.0 discloses a hydrocracking catalyst containing Y molecular sieve and its preparation method. In this invention, Y-type molecular sieve is obtained after hydrothermal treatment with a mixed aqueous solution of aluminum salt and acid, and the temperature-raising sensitivity of the prepared catalyst is Higher, but at the same time, the secondary cracking during the heating process increases significantly, and the hydrogen consumption increases significantly, which is not conducive to the stable operation of the industrial hydrocracking unit during the heating process
[0005] CN200810012212.6 discloses a hydrocracking catalyst carrier and its preparation method. The hydrocracking catalyst prepared by the invention has poor temperature raising sensitivity

Method used

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  • A method for preparing a hydrocracking catalyst containing y molecular sieve
  • A method for preparing a hydrocracking catalyst containing y molecular sieve
  • A method for preparing a hydrocracking catalyst containing y molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Molecular sieve modification process:

[0032] (1) Take 200g of NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium nitrate with a concentration of 0.5mol / L according to the liquid-solid ratio of 3:1, exchange at 70°C for 3 hours, repeat this process 3 times, and the exchanged Y molecular sieve Na content in Na 2 O is calculated as 2.5%;

[0033] (2) Hydrothermally treat the Y molecular sieve obtained in step (1) at 570°C and 0.1MPa for 2 hours;

[0034] (3) The molecular sieve obtained in step (2) is prepared according to a liquid-solid ratio of 10:1 and a hydrochloric acid solution with a concentration of 0.6mol / L (the concentration is expressed as H + meter) and mixed at 80°C for 2 hours at a constant temperature;

[0035] (4) The molecular sieve obtained in step (3) was dried at 150°C for 4 hours;

[0036] (5) Soak the molecular sieve obtained in step (4) in n-heptane solvent for 2 hours;

[0037] (6) The molecular sieves treated in st...

Embodiment 2

[0046] Molecular sieve modification process:

[0047] (1) Take the NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium nitrate with a concentration of 0.8mol / L according to the liquid-solid ratio of 3:1, exchange at 70°C for 3 hours, repeat this process 3 times, and the Y molecular sieve after exchange Na content in Na 2 O is calculated as 2.0%.

[0048] (2) Hydrothermally treat the Y molecular sieve obtained in step (1) at 600°C and 0.1MPa for 3 hours;

[0049] (3) The molecular sieve obtained in step (2) is mixed with H at a liquid-solid ratio of 7:1 + A mixed solution of hydrochloric acid with a concentration of 1.0mol / L was mixed and treated at 95°C for 2 hours;

[0050] (4) The molecular sieve obtained in step (3) was dried at 250°C for 2 hours;

[0051] (5) Soak the molecular sieve obtained in step (4) in toluene solvent for 3 hours;

[0052] (6) The molecular sieve treated in step (5) was dried at 130°C for 25 minutes;

[0053] (7) The ...

Embodiment 3

[0061] Molecular sieve modification process:

[0062] (1) Take the NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium nitrate with a concentration of 0.6mol / L according to the liquid-solid ratio of 3:1, exchange at 80°C for 2 hours, repeat this process 3 times, and the Y molecular sieve after exchange Na content in Na 2 O is calculated as 2.3%.

[0063] (2) Hydrothermally treat the Y molecular sieve obtained in step (1) at 590°C and 0.1MPa for 2 hours;

[0064] (3) The molecular sieve obtained in step (2) is mixed with H at a liquid-solid ratio of 5:1 + A mixed solution of hydrochloric acid with a concentration of 1.2mol / L was mixed and treated at 80°C for 2 hours;

[0065] (4) The molecular sieve obtained in step (3) was dried at 150°C for 6 hours;

[0066] (5) Soak the molecular sieve obtained in step (4) in xylene solvent for 4 hours;

[0067] (6) The molecular sieve treated in step (5) is dried at 200°C for 30 minutes;

[0068] (7) The mo...

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Abstract

The invention discloses a method for preparing a hydrocracking catalyst containing Y molecular sieve, which includes the following contents: 1. Mix the modified Y molecular sieve, amorphous silica-alumina and / or alumina uniformly according to the proportion, and add dilute nitric acid to form slurry Extrude, dry, and roast to obtain a silica-alumina carrier containing modified Y molecular sieve; 2. Use an impregnating solution containing active metals to impregnate the carrier in step 1, and dry and roast the impregnated carrier to obtain a hydrocracking catalyst . The hydrocracking catalyst prepared by the method of the invention has good temperature raising sensitivity and operational flexibility, and has broad application prospects in the hydrocracking reaction process.

Description

technical field [0001] The invention relates to a method for preparing a hydrocracking catalyst, in particular to a method for preparing a hydrocracking catalyst containing Y molecular sieve. Background technique [0002] Hydrocracking technology has the characteristics of strong adaptability to raw materials, great flexibility in production operations and product plans, and good product quality. It can directly convert various heavy and low-quality feedstocks into high-quality jet fuel, diesel, and lubricating oil base materials that are urgently needed by the market. As well as chemical naphtha and tail oil steam cracking raw materials for ethylene production, it has become one of the most important heavy oil deep processing processes in modern oil refining and petrochemical industries, and has been increasingly widely used at home and abroad. The heart of the hydrocracking process is the hydrocracking catalyst. Hydrocracking catalyst is a typical dual-function catalyst, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/16C10G47/20
Inventor 柳伟杜艳泽王凤来刘昶秦波张晓萍
Owner CHINA PETROLEUM & CHEM CORP